Means for sending alternating currents to multiplex lines



Oct. 27, 1931. R. HOOVER ET AL MEANS FOR SENDING ALTERNATING CURRENTS TOMULTIPLEX LINES Filed April 23, 1930 2 Sheets-Sheet 1 Imm mn NQ o RFM.

mm wn 55. @www lOct. 27, 1931. R. HOOVER ET AL 1,829,653

MEANS FOR SENDING ALTERNATING CURRENTS TO MULTIPLEX LINES vvv AAAAAPatented Octqv 27, 1931 'rE/s UNiT'sfnsTA rarslsrr ori-ics RAY HOOVER, vOF NORTH PLANFELD, NEVI AND ROBERT F. NIRKES, OF i YAIVJILYGLKIN'ETvYORK, ALSSIGNORS TO THT WESTERN UNION TELEGRAPH COMPANY,

OF NEW YORK, N. Y., A CORPORATION OF NEWtYOR-K MEANSFOR SENDING-ALTFR-NATING GURRNTS T MULTIPLEX LINES Y Application ksieri April 23,

lThis inventioniwrelatesto a telegraph transmission system and moreparticularly tn a multiplex telegraphV system .for transmitting rapidcurrent reversals to duplex telegraph Vlines for balancing purposes..

Thek present invention" is particularly `ad vantageous in multiplex'telegraphtransmission systems inWhich a single distributor is employedto transmit simultaneously to a pluralityof lines, asfor instance, inthe distribution of news,commodity quotations, and similar information,although itis not limit-V ed thereto. i i Y In the operation ofmultiplex systems, in addition to the ordinary intelligence signals, itis necessary to transmit, from timetotime, series of rapid currentreversals or alternatingcurrent impul'se'svfor use in Obtaining abalance between the ,artificial andfreal lines of theduplex systemandalso to transmit phasing impulses for'iuse in obtaining the proper phaserelation between the transmittingk and receiving distributors. y

Heretofore it has been necessary to4 disvcontinue the operation of thetape or other transmitter While sending the alternate current impulsesor ybalancing signals over the line. LAccording Vto one systemextensively used, the sending segments of the transmit-V contacts ofthetape transmitter by means of a lue' andsoclret'connection and 'oined toa l) e i i 7 balancing or alternatingcurrent block' which Y.serves Itosupply vpotential of one polarityto the alternate segments of thesending ring andy to 1 the remaining segments potentialof the oppositekpolarity, so as totransmit, altervnately, impulses of positive xandnegative polarity to theduplex line as the sending brush ofthedistributor passes over the sending segments. i i

transmittingV distributor signalslto the line` and, therefore, duringthe phasing periods the transmission ofiintelligencesignals through thedistributor must be f discontinued.

K twill vbe lappreciated vfrom the foregoing' that Where a singletransmitting distributor is employed to sendto large number of lines,

1930. .serial No.r 445,630.

that the transmission to all lines must be discontinued and the linesrendered idle Whenever it is necessary to send either balancing orphasing si gnalsto any one ofthe lines.v

An arrangement permitting the transmission of phasing signals to any oneor more of a number oflines associated with a single dis tributorlWithout interrupting the transmis sion of intelligence signals to theremaining lines, is described in our Patent No. 1,790,150,

dated January 1931, and entitled Means i of' phasing. The presentinvention has for'one of its obj ects to produce a. multiplex` telegraphsystem u"ilizing a single distributor for transmitting `simultaneouslytotwo or more lines,

mitting intelligence signals to one orm'ore lines and for transmittingbalancing signals or rapid current alternations to other lines.

i A still further object isto provide a ldistributorv having facilities,independent of the sending rings, for transmitting balancl king signalsto the lines associated therewith. .ting distributor aregdisconnected`from the Other objects and' advantages Will hereinafter appear. v

The present invention will be described with particular reference to theaccompanying drawings in which Figurel l 'is a diagrammatic View of atransmitting apparatus embodying our invention; and i Figure@ is adiagrammatic view of a portion of the apparatus for transmitting phasingsignals showing the relation thereof to the present invention. j 1 y jThe transmitting distributor shown in Figure l comprises aipair ofsending rings, a pair of local rings, and a pair of'A. C. sending ringsvor balancing rings, the distributor being arranged for two channelmultiplex l operation, although it isvto be understood that theinvention is equallyapplica-ble to three or four channel systems.

The ysendingrings comprise a solid ring 10 1;

Y 30; ,l The,A `C. sending rings comprise a solid and a segmented ring11, the latter having segments numberedl to 12. ASegments 1 to f6 areconnected, by a groupof conductors `12 tothe contact tongues 13 of aYtapetrans- -mitter`fl4, .operating intoibhannel A of thev i multiplexsystem and segments 7V to 12fare similarly associated, through a groupof con- .duetors 15,'with a tape'trans'mitterl operat-L, ing" intochannel B.V The tapeft'ransmitters Y 1o serve to set 'up on thesendingv'segments, combinations of positive and negative b attery in.accordance with'ai permutation'code,

' Vfor transmission to the'outgoingv lines. The

Y' tape transmitters may of the type shown in Patent V:[:l:1,298,440 toR; Benj amin, grantedv March 5, 11919, f f

VThe local rings,com.pr1se.alvr solid fring v17,k connected tota sourceiof positive ypolarity Y and a segmented ring. 1'8f.having.-twenty# foursegments. lSegments 2, 3v and v 4 arey conkne'cted to one terminal oftheoperating mag? net 19 of the BY` channel transmitter 16, and

` segments 14, 15 and Yare connected to the i i V 0151'ati`11g magnet20ct the -A-channeltrans-I mitter *214. Certain of ithe remainingsegments of ring`18are employedfor purposes apart fromf-thejpres'entinvention, 'as' for transmitting phasing Vsignals :and operation' of thereceiving printing mechanism.`

. f ring'21'fand a-v segmented ring 22, the latter having vsegr'netscorresponding in number to sending ringjll@ VThe voddfnuniberedA segfinents o'ffriiig2 are ystrapped together and 35 i connected to a.soureegof positive polarity, andthe even numbered s'eg'gmentsare;lstrapped ther and connected. to a source ofv inegare connec'edtonegative and .ositive battery respectively", the tongue' 27 is joined bya' conductor 28"to"a springjhof a pinjaek 29 and thence through springcon- [tact d to the apex cfa-duplex line L. v-

The solid AfCfsending ring 21f-is joined to the spring c of pinjaclr 30an'dthrough V Hspring l tothe windings yAaandB inparallel of a polarizedrelay' 31, andthence V to the ground at 32.- They marking'and spacingcontacts of, the relay 3.1 are connected' to neg- :ativeandpositive'battery respectively, andl the .relay tongueconnectedftof'spring cof jack 29.'v

Simultaneously, alternatingfcurrent impulsesv Y orJ current reversalsare produced by the A. C.'sendingarings, which loperate the polarizedrelay31 ltomove the relay .tongue back and forwardzbetweenthe markingand spacingv Contacts'.V The: circuit to the tongue 33 vof the relay isopen at the springe of 'jack 29 however, so that the currentreversalslare not transmitted tothe line.

Wheny itis desired to sendbalancing pulsesy over the line,'the pin35.'is removed `from jack 29, thus breaking they Contact between springsand` OZ to disconnectthe relay 25 vfrom the line, and establishingcontact between the springscand 0Z,thus connecting the tongue Aofthebalancingipolarizedrelay Thesending nected, as by groups Ofconductors36' and 37 respectively, to the polarized Yrelays andpinjaclrsassoe'iatedwith anumber of otherrdupleX` lines, so as totransmit simultaneously ,to am7 number of lines. I

lItffwill be n ted. h a't they arrangement'is 'such that Yany oneoftheflines maybe disconnv'ect'ed from'the sending ringlO andconnectedto the A. C, sending ringr21'without interfering with the operation ofthe remaining lines.v

will'be understood that in order to'perfo-rm ihefunctions described, theliaclrs29 and Vv30 may be dispensed withV and theconnections betweengtheduplex line and the tongues of the relays 25 and31 beumade through asim* lple switch. =ljlowever, the Vj acks perform the I IadditionalVAfunction of ,permitting phasing impulses tobe transmiited in additiontothe balancing signals, so j thatf it `is: possible to simultaneouslyvtransmite in'telligenee signals over' certair'i lines, balancingsignals-over other lines,.andphasing impulses over still other linesiy jI Y In Figure 2`we'have ill'ustratedan arrangement for'. transmittingphasing signals, in :order to showthe relation thereof` to the presentinvention. Forvthis purpose, Vv segfments 23 and 24 of local ring"18 areconnected rings! 1'f and may be coni,

toIspring-"b of jack V30,'and segment 1 of Vthe A local ring '18isconnec'ted to' sleeve e ojack 130, Y- ,Thel sleeve e" is alsoconnected throughV a highi resistance to a source of positive-potential4 rlhe tipspring aof the jack 30 is connected to Vthe vserieswindings'Cand D of the polarized" relay 31, thence toVY the Y* ground32;

when a isdesiredwsed phasing signals tothe duplex line, the solid pin 35is removed fm1-ackn-29iaadginsefedmeer! f3.0; thus e lcompleting thecircuit-shown,inV "Figure 2v from the phasing segments 23,"and 24 of thelocal rin'gjf18 toi the. `windings A` and B of. Vrelay' V31, `and alsocompleting aicircu'it from 'i segmentV l of the 100311ringV 18throughlthe sleeveand tip springs oflj aclrfSQf't-o the windings@ and D inseries, Upon ea'oh'revolu-V tion of thebrushoverthe local"rings,fthecir'-VVV cuit through the phasing segments 23 and 24 is completed, thusmoving the tongue of the relay 31 to its marking contact andtransmitting a marking signal to theV line. As

the brushv leaves the phasing segments, it enf gages segment l, thuscompleting a circuit lfrom positive battery to the windings C and D, in'such direction as to return the tongue y33 to its spacing contact. Thetongue is held on its spacingL contact during the passing of thevbrushover the remaining local segments' by the holding battery suppliedthrough the resistance R and sleeve of the ljack to the y windings C.and D. The holding current is reduced byL the resistance R to suchmagnitude that its eiiect is readily overcome by marking current appliedthrough'the phasing segments 23 and24tothe windings A and B. Y*

itwiii kim noted that wana@ pin' 35 in jack 29 or in jack 30, or inneither of the jacks, that eitherintelligence signals, correctionssignals or balancing signals may be transmitted to any one of the duplexlines without interrupting the transmission of any of these signals toany of the other lines.

' It is obvious' that the invention is useful in'otherv applicationsthan that described, and that' it 1 may be embodied in various formswithout departing therefrom, and we do not desire to be limited'to theexact details shown Vand described, except in accordance with thevappended claims.

VrW'hat we claim is: Y

l. In a multiplex telegraph system, a distributorhaving means fortransmitting intelligence signals to a multiplicity of lines and meansfor simultaneously transmitting current .reversals to other` lines. i2.- In a telegraphy system, a distributor, a plurality oflinesassociated withs'aid distribute-rand means including saiddistributor f forr selectively transmitting either intelligence signalsor current reversals to any of said lines. i

' l 3. In a telegraph system, a transmitting l ,signals, a plurality oflines associated with said transmitting apparatus and,` selective meansfor `permitting thek transmission of either set of signals to 'all or apart of said lines or for transmitting one set of signals to certain ofsaid lines simultaneously with the transmission of theother set ofsignals to others of said lines. y 5; In a Atelegraph vsystem atransmitting distributor having a plurality of signaldistributing'rings,a plurality of lines associated with said distributor and means forselectively distributing signals from any of said rings to any of saidlines.

6. In a multiplex telegraph system, a rotary distributor having anintelligence signal sending ring and a balancing signal sending ring,'aplurality of duplex lines, an intelligence signal transmitting relay anda balancing signal transmitting relay for each line, connected to saidrings and means yfor connecting the tongues of either of said relays toany of said lines to transmit either intelligence or balancing signalsthereto.

7. A telegraph system comprising a rotary distributor having two sets ofsending rings, f

distributor having two sets of sending rings,

means connected to one of said sets ofsending rings for transmittingpermutation code signals and means connected to the other of' said setsof rings for transmitting current alternations, a plurality of linesassociated with said distributor and means for repeatingperf mutationcode signals over any one or more of said lines and means for repeatingcurrent alternations over all or a part of the remain* ing lines. .Y

9. In a telegraph system, a transmitting "apparatus having means forsimultaneously generating three distinct sets of signals, a

line associated with said apparatus, a relay y controlled by .one ofsaid sets of signals, a

ysecond relay, means for controlling said second relay from either ofsaid other two sets of signals and means for connecting the tongues ofeither of said relays to said line whereby any one of said three sets ofsignals may be transmitted over said line.

In testimony whereof we aiix our signatures.

RAY HOOVER. ROBERT F. DIRKES.

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